Anisotropy-Exchange Resonance as a Mechanism for Entangled State Switching

TL;DR

This paper investigates how anisotropy-exchange resonance can be used to control and switch entangled states in a three-particle spin system, with potential applications in quantum information processing.

Contribution

It introduces a mechanism for entangled state switching based on anisotropy-exchange resonance in a three-spin model with anisotropic exchange coupling.

Findings

Entangled states can be prepared, controlled, and read via a single particle.

Resonance conditions maximize entanglement switching behavior.

Switching is robust against variations in anisotropic exchange coupling.

Abstract

We explore the three-particle spin model of an $S_{1}=\frac{1}{2}$ particle (e.g. a stationary electron) interacting with two spin-coupled $S_{\text{2,3}}$ particles with exchange coupling and magnetic anisotropy. We find that in the case of $S_{2,3}=1$ particles, the coupled particle entanglement states can be prepared, controlled, and read by the $S_{1}$ particle. We also find that for particular resonance conditions of the magnetic anisotropy strength $D$ and exchange coupling strength $J$, the entanglement state switching behavior is maximized and is robust against a range of anisotropic application of the exchange coupling.